Spacers, four of them. It's all about not flexing the mobo. 4 piles of fibre washers might be a substitute if you can get them. Enough for three or four mm at each corner/post to space backplate away from mobo.

insert your bolt from the back plate and screw. imo the backplate is beefy enough to prevent warping from tightening the thumb screws. so far, I've had this installed on three different mb and not one shorted or got warped Edited by wermad - 12/13/10 at 10:15pm

The backplate is beefy enough not to bend, but mobo is not.
Step 6 of Socket 1366 instructions
"Standoffs are used to prevent possible overtightening of screws and causing potential damage to PCB"
In step 7 you add the EPDM rubber insulator under backplate.

The backplate is beefy enough not to bend, but mobo is not.
Step 6 of Socket 1366 instructions
"Standoffs are used to prevent possible overtightening of screws and causing potential damage to PCB"
In step 7 you add the EPDM rubber insulator under backplate.

They seem to use them on 1156 and 1366, but not 775.
Your choice but.

just read the instructions and saw the standoffs for 1156/1366, Im currently not using them but I will add them now. I had two amd setups before and never used them, will do now

insert your bolt from the back plate and screw. imo the backplate is beefy enough to prevent warping from tightening the thumb screws. so far, I've had this installed on three different mb and not one shorted or got warped